ChemInform Abstract: ANODIC BEHAVIOR OF NIOBIUM‐NICKEL AND TANTALUM‐NICKEL ALLOYS IN ACID SOLUTIONS

Trusov, G. N.; Gochalieva, E. P.; Goncharenko, B. A.; Mikheev, V. S.

doi:10.1002/chin.197746027

Cited by 1 publication

(3 citation statements)

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“…No nickel was detected in the resulting solution by the dimethyl glyoxime test, implying a Ni dissolution rate of <0.08 mg dm -2 day -1. [We note that Trusov et al (10) have reported an apparently abrupt cessation of the ability of Nb to passivate Ni-Nb crystalline alloys in 1.5M H.2SO4 and 3M HCI between the compositions 75Ni-25Nb and 85Ni-15Nb.] In the second test, 1 cm 2 of abraded ribbon surface was polarized at 10 mA cm -2 for 17.5h in 1 cm 3 of 30% KOH.…”

Section: Methodsmentioning

confidence: 65%

“…Polyphasic crystalline Ni-Nb alloys have been examined by Trusov etal. (10) in 3M HC1 and 1M I-t2SO~ and by Sugimoto etal. (11,12) in 25 weight percent (w/o) KOH.…”

mentioning

confidence: 79%

“…It is of interest to note that Trusov et al (10) observed a current efficiency of only 2 • 10-3% for anodic dissolution from a crystalline 75Ni-25Nb ahoy polarized at 50 mA cm -2 in 3M HC1 for 24h. We also found no evidence of corrosion when the glassy alloy was anodized in 1M tIC1.…”

Section: Methodsmentioning

confidence: 99%

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The Electrochemistry of Glassy 60Ni‐40Nb in Aqueous Media

Grant

Archer

1984

J. Electrochem. Soc.

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The electrochemistry of glassy melt-spun 60 atom percent (a/o) Ni-40 a/o Nb was investigated at moderate temperatures in various aqueous media. The alloy was very corrosion resistant to most acids and alkalis, but it was attacked by aqueous HF. Cyclic voltammograms of the glassy alloy in 15M NaOH indicated the existence of a thin nickel oxide corrosion layer from which niobium was absent. Linear sweep vottammetry in the oxygen evolution region, constant current chronopotentiometry, and rest potential decay measurements confirmed that the alloy surface in alkali consisted of nickel oxides. Chronopotentiometry in 0.5M H2SO4 at 30~ indicated the formation of a thin niobium oxide corrosion film which did not prevent oxygen evolution. Anodization in concentrated neutral KC1 caused severe corrosion. On cathodization in acid, the glassy alloy absorbed ca. 14 a/o hydrogen and was severely embrittled. Attempted hydrogen permeation experiments caused ribbon fracture; as-quenched and low temperature-annealed glasses behaved differently in this respect. * Electrochemical Society Active Member. Key words; glassy metal, NI-Nb alloy. ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 130.126.162.126 Downloaded on 2015-03-14 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 130.126.162.126 Downloaded on 2015-03-14 to IP Vol. 13I, No. 5 GLASSY 60Ni-40Nb 1001 ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 130.126.162.126 Downloaded on 2015-03-14 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 130.126.162.126 Downloaded on 2015-03-14 to IP

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Section: Methodsmentioning

confidence: 65%

“…Polyphasic crystalline Ni-Nb alloys have been examined by Trusov etal. (10) in 3M HC1 and 1M I-t2SO~ and by Sugimoto etal. (11,12) in 25 weight percent (w/o) KOH.…”

mentioning

confidence: 79%